A taxonomic revision of two genera, Pleurolobus and Sohmaea (Leguminosae) in Thailand and Indo-China Author Saisorn, Witsanu School of Science, Walailak University, Nakhon Si Thammarat 80161, Thailand. Author Chantaranothai, Pranom Department of Biology & Centre of Excellence on Biodiversity (BDC), Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. text Phytotaxa 2022 2022-11-23 573 2 231 246 http://dx.doi.org/10.11646/phytotaxa.573.2.4 journal article 194617 10.11646/phytotaxa.573.2.4 80d52cdf-fbd6-4aa4-b9f1-c6e8ac9dc473 1179-3163 7349951 3.1 Sohmaea laxiflora subsp. lacei (Schindl.) W.Saisorn & Chantaranothai , comb. nov. ≡ Desmodium lacei Schindler (1926: 261) . Type:— MYANMAR . Taungngu , Saing Yani Reserve , 500 ft. elev., 14 Dec. 1909 , Lace 5027 ( holotype K ! K000858871 , isotype E! E00301249) . ≡ Desmodium laxiflorum subsp. lacei (Schindl.) H. Ohashi (1973: 103) . ≡ Sohmaea lacei (Schindl.) H.Ohashi & K.Ohashi (2018b: 162) . Distribution :— India , Myanmar , and Thailand . Ecology :—Deciduous forest, on limestone soil; 500–550 m elev. Phenology :—Flowering in September. Fruiting in September–December. Notes :—This subspecies differs from the typical subspecies in a number of leaflets and upper tooth of calyx. Other morphological characters are very similar to each, especially inflorescence type , calyx, corolla, staminal tube, fruit, and seed. This taxon is therefore treated under Sohmaea laxiflora . Specimens examined :— THAILAND . Lamphun : Mae Tha , Doi Khun Tan National Park , 29 Sept. 1994 , Maxwell 94-1055 ( BKF , CMUB , L ) ; Tak : Umphang , Thi Lo Su waterfall, 8 Oct. 2014 , Mattapha 266 ( KKU ) , Mae Sot , Wat Tham Manora , 11 Sept. 2009 , Middleton & Triboun 4855 ( BKF ) & Mae Ramat , Mae Sot-Tha Song Yang Road , 6 Nov. 2010 , Pooma et al. 7531 ( K ) .